code: def can_reuse_epoch_itr_across_epochs(self):
      return all(
          ds.can_reuse_epoch_itr_across_epochs
          for ds in self.defn.values()
      )
  
file_path: fairseq/fairseq/data/nested_dictionary_dataset.py
imports: from collections import OrderedDict
  import torch
  from torch.utils.data.dataloader import default_collate
  from .None import FairseqDataset
label_desc: Use image node_id 9 for calling the NestedDictionaryDataset obj's underlying member method code with example usage: obj.can_reuse_epoch_itr_across_epochs() and returns: all